Message generation errors can be somewhat more difficult to reproduce.
As a starting point, the best things to send are:
Your message definition file.
An example of a message that you have generated with it.
A explanation of what the issue you have is with the generation.
If this is not enough information we may request that you use the generate
complete project option in Chameleon and make a simple stand alone example
that illustrates the problem.
It always makes good sense when debugging software to
cleanly isolate problems to solve them. The very process
of isolating a problem is often enough to figure out the
solution.